Improvement in steam-boilers



UNITED STATES PATENT OFFICE.

F. R. VALKER, OF TULLY, MISSOURI.

IMPROVEMENT IN STEAM-BOILERS.

Specication forming part of Letters Patent No. 18,875, dated December15, 1857.

To all whom t may concern:

Be it known that I, F. R. IVALKER, of Tully, in the county of Lewis andState of Missouri, have invented certain new and useful Improvements inSteam-Boilers; and I hereby do declare that the following is a full andexact description thereof,reterence beinghad to the accompanyingdrawings, and to the let ters of reference marked thereon.

Figure 1 is a sectional view of a perpendicular boiler, showing theimprovements. Fig. 2 is a view of one ofthe flue-sheets, showing theposition of the lines. Fig. l3 is a View of the scraper and a portion ofa iiue. Fig. ll is a View of one of the kinds of Scrapers used to cleanthe ilues. Fig. 5 is a view of a scraper with a corrugated edge.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

In the construction of my invention Fig. l is a sectional view of aperpendicular boiler, showing its improvements and their arrangement.

A is what I shall call an upper waterchamber, and when .in use it is tocontain water in it as high as the dotted lines, the remainder of thespace to be occupied by the steam. 3 is what I term a lowerwaterchamber. These two water-chambers are connected together and acommunication formed between them by the fines marked C O C O O. Theselues are made in the ordinary manner and are fastened into theliucsheets D and E. These flue-sheets form the bottom of the upperwaterlchamberA and the other forms the top of the lower waterchamber l3.The lower water-chamber is suspended from the upper water-chamber, andis sus` tained by the lines C O C C C for the purpose ot allowing thesaid fines to expand and contract without starting their joints at thepoint where they join the flue-sheets D and E, which it otherwise'woulddo if this provision was not made. (This is a point which should beparticularly noticed, as it will be readily seen that by thisarrangement a defect which has always been of considerable annoyance toengineers when using small-fined boilers is effectually overcome;therefore has a tendency to make a set of iiues last for a longerperiod.) The reason why small tlues get loose at the joint and produce aleakage between said llues and nue-sheet is because they expand andcontract quicker than any other part of the boiler. Therefore thelluesheet must be sprung out or in, as the case may be, or the jointmust become loose, causing a leak around the said joints.

F F are partitions between the lines for the purpose of turning the lirein proper directions to produce an equal and perfect circulation of theheat among the said fines.

G is the chimney or exit for the smoke.

l-I is the passage for the iire from the furnace to the fines.

I is the furnace or tire-chamber.

.l is the mud-valve.

K represents pipes connecting with the pumps to supply the boiler withwater.

L is the man-hole or entrance to the inside of the lower water-chamberfor the purpose of allowing it to be cleaned out when desirable.

lll is the water-gage cock for the purpose of knowing what the height ofthe water is in the upper water-chamber.

N is the dry-pipe to allow the steam to pass from the boiler to thecylinders of the engine.

O is the safety-valve.

P P P P P are screw-plugs. These plugs are to be removed when it isfound necessary to clean the scale from the inside of the lues C C C CC. The holes that receive these plugs are placed directly over saidiiues. This allows the scrapers to be introduced to clean them fromscale and other mattei'. There is the same number of these screw-plugsas ot' the iiues. Y

Q is a man-hole or entrance to the upper waterchamber for the purpose ofallowing the said chamber to be cleaned.

R R are lugs to support the boiler. These lugs rest upon the ease S S.This case forms the outside of the boiler and consists of an outside andinside cylinder made of iron or other material. The inside cylinder issmaller than the outside one for the purpose of leaving a space betweenthem. This space is to be filled with ashes or any other non-conductingmaterial forthe purpose of excluding the cold and keeping in the heat,thereby causing a very great saving of heat and fuel. This space ismarked T. This kind of casing can be applied to many kinds of boilerswith great advantage. It will readily be seen that this kind of a boilerwill be very effective and at Fig. 2 is atop View of one of theuesheets, r

showing the position of the fines.

Fig. 3 is a View of one of the Scrapers to be used in cleaning theflues; also, a portion of ay flue showing the mode of its operation.

Fig. 4 is a View of one of the Scrapers. It consists of a circular pieceVof iron fastened 'to a long rod or handle.

Fig. 5 is a'view of a scraper with its edge corrugated. This scraperWill be the rst to be run through the fines. Thereason Why this is usedfirst is because itwill furrow or roughen up the scale, so that thecircular scraper, Which is to be used next, will take off thescale withmore ease. Therefore by this means the filles will be thoroughlycleaned.

The arrangement of the vertical detlecting- V"plates F in relation tothe Water-tubes C, the Water-spaces B and A, and the furnace and uptake,as herein set forth.

F. R. WALKER. [L s] Witnesses:

H. L. HERVEY, lV. S. LEE.

